Overview
The ZF 4657.056.201 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully integrated drop-in replacement for heavy-duty powershift applications. This complete assembly serves as the central torque and speed conversion hub within the WG 210 series, managing clutch engagement and gear ratio selection under high-load conditions. The SKU 4657.056.201 designates a factory-matched unit that includes the main gear cluster, clutch packs, and valve body. It interfaces directly with the TRANSMISSION HOUSING to form the structural backbone of the driveline, while the HOUS.FRONT SECT and HOUSING REAR PART enclose the rotating components. For complete rebuilds, the HOUSING REAR SECTION is often replaced concurrently to ensure proper alignment.
Symptoms of Failure
- Erratic gear engagement or slipping under load: Worn clutch discs or degraded seals inside the assembly cause delayed shifts or loss of torque transfer, especially during uphill hauling.
- Low hydraulic pressure and delayed response: Internal leakage past piston rings or valve body wear results in sluggish forward/reverse engagement, often accompanied by a whining pump noise.
- Contaminated transmission fluid with metallic debris: Bearing spalling or gear tooth chipping within the 4657.056.201 unit introduces ferrous particles into the oil, visible during drain intervals.
- External oil seepage at mating flanges: Cracks in the main housing or gasket failure at the interface with the TRANSMISSION HOUSING lead to drips near the bell housing area.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.056.201 |
| Assembly Type | Complete Powershift Unit (6-speed) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 410 mm |
| Overall Height | 480 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| OEM Reference | ZF 6 WG 210 |
| Max Input Torque | 2,100 Nm |
| Fluid Capacity | 22 liters (ZF TE-ML 03/05) |
Compatibility
This complete unit is engineered for the ZF WG 210 series powershift transmissions. It is directly compatible with the following ZF models: WG 180, WG 200, WG 210, and WG 211. It also fits select variants of the WG 160 and WG 250 when used with the appropriate HOUS.FRONT SECT adapter kit. Always verify the bell housing pattern and torque converter match before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101080 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201167 | HOUS.FRONT SECT | Front adapter section for bell housing |
| 4657201171 | HOUSING REAR PART | Rear cover for output shaft support |
| 4657298103 | HOUSING REAR SECTION | Extended rear housing for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100801 | CAP SCREW | M12 fastener for housing joints |
| 4656301148 | FIXING PLATE | Retaining plate for clutch piston |
| 4657301034 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | M10 bolt for valve body mounting |
